Can end with bonded seal slide

ABSTRACT

A can end is disclosed which is provided with a pour opening having a pour width. The pour opening is provided with an entry aperture at one end of the pour opening, the entry aperture having a slide width greater than the pour width. The can end has a can end lapping portion and a can end sealing portion adjacent the pour opening and a plane of bulge strength adjacent the entry aperture. A slide is adapted to pass through the entry aperture and has a slide lapping portion and a slide sealing portion. The slide lapping portion is adapted to register with the can end lapping portion, and the slide sealing portion is adapted to register with the plane of bulge strength. A pull tab has a connection to the slide. Engaging means engage the can end lapping portion to press the can end lapping portion into intimate contact with the slide lapping portion and the slide sealing portion into intimate contact with the plane of bulge strength. A pressure barrier material seals the intimately contacting can end sealing portion and the slide lapping portion and also seals the intimately contacting plane of bulge strength and the slide sealing portion. The pressure barrier material is bonded to the can end sealing portion with a first predetermined shear strength and to the slide lapping portion and to the plane of bulge strength with a second predetermined shear strength less than the first predetermined shear strength. The pull tab has a plane of weakness on one side of the connection to the slide and a pressure portion on the other side of the connection. The pull tab is movable away from the can end about the plane of weakness to cause the pressure portion to break the bond between the slide lapping portion and the pressure barrier material adjacent the can end sealing portion so that the pressure barrier material adjacent the can end sealing portion now functions as an exit and reclosure slide guide. The pull tab is movable to break the bond between the pressure barrier material adjacent the plane of bulge strength and the slide sealing portion and to cause the slide to move through the entry aperture on the pressure barrier material adjacent the plane of bulge strength and on such pressure barrier material as a guide to uncover the pour opening.

[72] Inventor Donald L. Douty Franklin Township, Westmoreland County, Pa. [2]] Appl. No. 61,384 [22] Filed Aug. 5, 1970 [45] Patented Nov. 23, 1971 [73] Assignee United States Steel Corporatlon I54] CAN END WITH BONDED SEAL SLIDE 56 Claims, 7| Drawing Figs.

[52] U.S.Cl. 222/541, 222/56 I 220/4 l, 220/53 (5 l] Int. Cl. 865d 47/10 [50] Field of Search 222/541 55), 561. 560, I53; 220/47. 41 53, 54, 23, 46; 229/7 SC [56] References Clted UNITED STATES PATENTS 3,250.436 5/1966 Kurtz 222/153 3,308,986 3/1967 Balocca et al. f 220/53 3,363.798 1/1968 Garangiotis 220/4l Primary Examiner-Stanley H. Tollberg Allurney-Robert J. Leek, Jr.

ABSTRACT: A can end is disclosed which is provided with a pour opening having a pour width. The pour opening is provided with an entry aperture at one end of the pour opening, the entry aperture having a slide width greater than the pour width. The can end has a can end lapping portion and a can end sealing portion adjacent the pour opening and a plane of bulge strength adjacent the entry aperture. A slide is adapted to pass through the entry aperture and has a slide lapping portion and a slide sealing portion. The slide lapping portion is adapted to register with the can end lapping portion. and the slide sealing portion is adapted to register with the plane of bulge strength. A pull tab has a connection to the slide. Engaging means engage the can end lapping portion to press the can end lapping portion into intimate contact with the slide lapping portion and the slide sealing portion into intimate contact with the plane of bulge strength. A pressure barrier material seals the intimately contacting can end sealing portion and the slide lapping portion and also seals the intimately contacting plane of bulge strength and the slide sealing ortion. The pressure barrier material is bonded to the can end sealing portion with a first predetermined shear strength and to the slide lapping portion and to the plane of bulge strength with a second predetermined shear strength less than the first predetermined shear strength. The pull tab has a plane of weakness on one side of the connection to the slide and a pres sure portion on the other side of the connection. The pull tab is movable away from the can end about the plane of weakness to cause the pressure portion to break the bond between the slide lapping portion and the pressure barrier material adjacent the can end sealing portion so that the pressure barrier material adjacent the can end sealing portion now functions as an exit and reclosure slide guide. The pull tab is movable to break the bond between the pressure barrier material adjacent the plane of bulge strength and the slide sealing portion and to cause the slide to move through the entry aperture on the pressure barrier material adjacent the plane of bulge strength and on such pressure barrier material as a guide to uncover the pour opening.

PATENTEDN 23 H 3,622,055

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FIG. 8E

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INVENTOR DONALD L. DOUTY PATENTEDuuv 23 I97! sum 11 [1F 34 INVENTOR DONALD L. DOUTY PATENTEDunv 23 L9H 3. 622.055

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FIG. I3F

INVENTOR DONALD L. DOUTY PATENTEBunv 2a l97| sum 1a or 34 INYENTOR DONALD L. DOUTY PATENTEDHH 2319?! 3,622,055

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1. In combination: a. a can end provided with a pour opening having a pour width,
 1. said pour opening being provided with an entry aperture at one end of said pour opening, said entry aperture having a slide width greater than said pour width,
 2. said can end having a can end lapping portion and a can end sealing portion adjacent said pour opening and a plane of bulge strength adjacent said entry aperture, b. a slide adapted to pass through said entry aperture and having a slide lapping portion and a slide sealing portion,
 1. said slide lapping portion being adapted to register with said can end lapping portion, and
 2. said slide sealing portion being adapted to register with said plane of bulge strength, c. a pull tab having a connection to said slide, d. engaging means engaging said can end lapping portion to press said can end lapping portion into intimate contact with said slide lapping portion and said slide sealing portion into intimate contact with said plane of bulge strength, e. a pressure barrier material for sealing said intimately contacting can end sealing portion and said slide lapping portion and also for sealing said intimately contacting plane of bulge strength and said slide sealing portion,
 1. said pressure barrier material being bonded to said can end sealing portion with a first predetermined shear strength and to said slide lapping portion and to said plane of bulge strength with a second predetermined shear strength less than said first predetermined shear strength, f. said pull tab having a plane of weakness on one side of said connection to said slide and a pressure portion on the other side of said connection, g. said pull tab being movable away from said can end about said plane of weakness to cause said pressure portion to break the bond between said slide lapping portion and said pressure barrier material adjacent said can end sealing portion so that said pressure barrier material adjacent said can end sealing portion now functions as an exit and reclosure slide guide, and h. said pull tab then being movable to break the bond between said pressure barrier material adjacent said plane of bulge strength and said slide sealing portion and to cause said slide to move through said entry aperture on said pressure barrier material adjacent said plane of bulge strength as a guide to uncover said pour opening.
 2. said can end having a can end lapping portion and a can end sealing portion adjacent said pour opening and a plane of bulge strength adjacent said entry aperture, b. a slide adapted to pass through said entry aperture and having a slide lapping portion and a slide sealing portion,
 2. said slide sealing portion being adapted to register with said plane of bulge strength, c. a pull tab having a connection to said slide, d. engaging means engaging said can end lapping portion to press said can end lapping portion into intimate contact with said slide lapping portion and said slide sealing portion into intimate contact with said plane of bulge strength, e. a pressure barrier material for sealing said intimately contacting can end sealing portion and said slide lapping portion and also for sealing said intimately contacting plane of bulge strength and said slide sealing portion,
 2. The combination recited in claim 1 wherein said entry aperture is a slit.
 3. The combination recited in claim 1 wherein said entry aperture is a slot.
 4. The combination recited in claim 1 wherein said entry aperture is provided with a slide guide means.
 5. The combination recited in claim 1 wherein said slide has a bulge strength measured in pounds per square inch equal to or greater than the bulge strength of said can end.
 6. The combination recited in claim 1 wherein said engaging means is said pull tab engaging said can end lapping portion.
 7. The combination recited in claim 1 wherein said engaging means has a Stationary member supporting one member of said pull tab, said slide and said can end and a movable member engaging another member of said pull tab, said slide and said can end.
 8. The combination recited in claim 1 wherein said connection is within said pour opening.
 9. The combination recited in claim 1 wherein said connection is integral with one of said pull tab and said slide.
 10. The combination recited in claim 1 wherein said connection is separate from one of said pull tab and said slide.
 11. The combination recited in claim 1 wherein said engaging means is magnetic.
 12. The combination recited in claim 1 wherein said connection engages said entry aperture and functions as a stop to prevent said slide from leaving said entry aperture.
 13. The combination recited in claim 1 and having stop means on said slide for engaging said entry aperture to prevent said slide from leaving said entry aperture.
 14. The combination recited in claim 1 wherein said connection is a weld.
 15. The combination recited in claim 1 wherein said connection is an adhesive.
 16. The combination recited in claim 1 wherein said pressure portion is a leg.
 17. The combination recited in claim 1 wherein said connection is sealed to said slide by said pressure barrier material.
 18. The combination recited in claim 1 wherein said pour opening is radial.
 19. The combination recited in claim 1 wherein said pour opening is chordal.
 20. The combination recited in claim 1 wherein said can end has an embossment around said pour opening.
 21. The combination recited in claim 20 wherein said embossment is upward.
 22. The combination recited in claim 20 wherein said embossment is downward for vacuum sealing.
 23. The combination recited in claim 1 wherein said pressure portion has a locking tab for engaging said can end.
 24. The combination recited in claim 23 wherein said locking tab has a locking tab plane of weakness.
 25. The combination recited in claim 1 wherein said pour opening has substantially straight sides and said entry aperture vents said can end when said pour opening is exposed.
 26. The combination recited in claim 1 wherein said pour opening has arcuate sides and said entry aperture vents said pour opening when said pour opening is exposed.
 27. The combination recited in claim 1 wherein said pull tab is of the corrugated type.
 28. The combination recited in claim 1 wherein said pull tab is of the ring type.
 29. The combination recited in claim 1 wherein said pull tab is of the serrated type.
 30. The combination recited in claim 1 wherein said pull tab is of the projecting type.
 31. The combination recited in claim 1 wherein said pull tab is of the waffle type.
 32. The combination recited in claim 1 wherein said pull tab has a plurality of protuberances.
 33. The combination recited in claim 1 wherein said pull tab has a plurality of cavities.
 34. The combination recited in claim 1 wherein said pull tab is of the embossed aperture type.
 35. The combination recited in claim 1 wherein said can end is provided with a vent aperture and one vent closure portion of said slide or said pull tab is adapted to cover said vent aperture, said pressure barrier material being adapted to seal said vent aperture to said one vent closure portion, said one vent closure portion being operable to break said seal between said vent aperture and said one vent closure portion when said slide moves out of said entry aperture.
 36. The combination recited in claim 35 wherein said vent aperture is provided with a vent entry aperture.
 37. The combination recited in claim 36 wherein said vent entry aperture is a slot.
 38. The combination recited in claim 36 wherein said vent entry aperture is a slit.
 39. The combination recited in claim 36 wherein said vent entry aperture is provided with a slide guide means.
 40. The combination recited in claim 36 wherein said onE vent closure portion has stop means for engaging said entry aperture to prevent said one vent closure portion from leaving said entry aperture.
 41. The combination recited in claim 35 wherein said one vent closure portion has a bulge strength measured in pounds per square inch equal to or greater than the bulge strength of said can end.
 42. The combination recited in claim 35 wherein said vent aperture is radial.
 43. The combination recited in claim 35 wherein said vent aperture is chordal.
 44. The combination recited in claim 35 wherein said can end has an embossment around said vent aperture embossment.
 45. The combination recited in claim 44 wherein said vent aperture embossment is upward.
 46. The combination recited in claim 44 wherein said vent aperture embossment is downward for vacuum seals.
 47. The combination recited in claim 35 wherein said one vent closure portion has locking tab for engaging said can end.
 48. The combination recited in claim 35 wherein said vent aperture has substantially straight sides.
 49. The combination recited in claim 35 wherein said vent aperture has arcuate sides.
 50. The combination recited in claim 35 and having vent closure engaging means, said vent closure engaging means having a stationary member supporting one member of said pull tab, said slide and said can end and a movable member engaging another member of said pull tab, said slide and said can end.
 51. The combination recited in claim 35 having magnetic-type vent closure engaging means.
 52. The combination recited in claim 35 wherein said one vent closure portion is integral with either said slide or said pull tab.
 53. The combination recited in claim 35 wherein said one vent closure portion is separate from either said slide or said pull tab and having a vent closure connection for connecting said one vent closure portion to either said slide or said pull tab.
 54. The combination recited in claim 1 wherein said stop means is on said can end.
 55. The combination recited in claim 1 and having stop means on said one vent closure portion for limiting the movement of said slide by engagement of said stop means with said can end.
 56. The combination recited in claim 35 wherein said pull tab is of the expansion type. 